Acetyl group

Actinomycin D

Acycloguanosine (aka Acyclovir or Gancyclovir)

Allopurinal

Alpha-Amantin

Aminopterin

Azidothymidine (AZT)

Azaserine

Bactrim

Bisdaunomycin

Bucindolol

Campothecins

Carnitine

Colchicine

Daxorubicin

Debrisoquin

Diptheria toxin

Ethidium bromide

Etopocide

Erythromycin

Extrinsic factor

Fexofenadine

5-fluorouracil

Fusidic Acid

Giemsa

HIV Protease inhibitors

Hoechst 33258

Intrinsic factor

Leutinizing hormone (LH)

Mercaptopurine

Methotrexate

Methyl group

Mitomycin C

Nelfinar (Nelfinavir)

Netropsin

Nortiptyline

Phytohemagglutinin

Probenecid

Puromycin

Quinacrine

Quinolone agents

Rifampicin

Somatotrophin

Streptomycin

Succinlycholine

Sulfa drugs (i.e. Sulfanilimide)

Tamoxifen

Thalidomide

Tetrahydrobiopterin

Tetracycline

Tyrosine

Vitamin B9 (Folic acid)

Vitamin B12 (cobalamin)